A group decision making method based on double hesitant linguistic preference relations

A simple decision method is proposed to solve the group decision making problems in which the weights of decision organizations are unknown and the preferences for alternatives are provided by double hesitant linguistic preference relations. First, double hesitant linguistic elements are defined as representing the uncertain assessment information in the process of group decision making accurately and comprehensively, and the double hesitant linguistic weighted averaging operator is developed based on the defined operational laws for double hesitant linguistic elements. Then, double hesitant linguistic preference relations are defined and a means to objectively determine the weights of decision organizations is put forward using the standard deviation of scores of preferences provided by the individual decision organization for altematives. Finally the correlation coefficient between the scores of preferences and the scores of preferences are provided by the other decision organizations. Accordingly, a group decision method based on double hesitant linguistic preference relations is proposed, and a practical example of the Jiudianxia reservoir operation alternative selection is used to illustrate the practicability and validity of the method. Finally, the proposed method is compared with the existing methods. Comparative results show that the proposed method can deal with the double hesitant linguistic preference information directly, does not need any information transformation, and can thus reduce the loss of original decision information.

Accurate design of spatially separated double active site in Bi_(4)NbO_(8)Cl single crystal to promote Z-Scheme photocatalytic overall water splitting

The efficiency of photocatalytic overall water splitting was mainly limited by the slow reaction kinetics of water oxidation.How to design effective surface active site to overcome the slow water oxidation reaction was a major challenge.Here,we propose a strategy to accelerate surface water oxidation through the fabrication spatially separated double active sites.FeCoPi/Bi_(4)NbO_(8)Cl-OVs photocatalyst with spatially separated double active site was prepared by hydrogen reduction photoanode deposition method.Due to the high matching of the spatial loading positions of FeCoPi and OVs with the photogenerated charge distribution of Bi_(4)NbO_(8)Cl and corresponding reaction mechanisms of substrate,the FeCoPi and OVs on the(001)and(010)crystal planes of Bi_(4)NbO_(8)Cl photocatalyst provided surface active site for water oxidation reaction and electron shuttle reaction(Fe^(3+)/Fe^(2+)),respectively.Under visible light irradiation,the evolution O_(2)rate of FeCoPi/Bi_(4)NbO_(8)Cl OVs was 16.8μmol h^(-1),as 32.9 times as Bi_(4)NbO_(8)Cl.Furthermore,a hydrogen evolution co-catalyst PtRu@Cr_(2)O_(3)was prepared by sequential photodeposition method.Due to the introduction of Ru,the Schottky barrier between PbTiO_(3)and Pt was effectively reduced,which promoted the transfer of photogenerated electrons to PtRu@Cr_(2)O_(3)thermodynamically,the evolution H_(2)rate on PtRu@Cr_(2)O_(3)/PbTiO_(3)increased to 664.8 times.On based of the synchronous enhancement of the water oxidation performance on FeCoPi/Bi_(4)NbO_(8)Cl-OVs and water reduction performance on PtRu@Cr_(2)O_(3)/PbTiO_(3),a novel Z-Scheme photocatalytic overall water splitting system(FeCoPi/Bi_(4)NbO_(8)Cl-OVs)mediated by Fe^(3+)/Fe^(2+)had successfully constructed.Under visible light irradiation,the evolution rates of H_(2)and O_(2)were 2.5 and 1.3μmol h^(-1),respectively.This work can provide some reference for the design of active site and the controllable synthesis of OVs spatial position.On the other hand,the hydrogen evolution co catalyst(PtRu@Cr_(2)O_(3))and the co catalyst FeCoPi for oxygen evolution contributed to the construction of an overall water splitting system.

REPRESENTATION OF STATISTICAL PROPERTIES OF WAVE GROUPS FOR SEA PROCESSES WITH DOUBLE-PEAKED SPECTRA

A method using group-induced second-order long waves(GSLW) to represent statistical properties of wave groups with double-peaked spectra is put forward in this paper on the basis of the GSLW theory. The GSLW is regarded as a weighted linear superimposition of the second-order long Wave induced by the low peak frequency section and that induced by the high peak frequency section. There is a parabolic relationship between the GSLW and the wave envelope. Then the probability density function and the distribution function of the GSLW amplitude are derived. Thus the formulas for the average time duration and the mean length of runs can be derived. Good agreement between theoretical results and measured values was achieved. as verified with the measured double-peaked spectra in different regions.

二面体群群代数的Drinfeld double表示

研究2n阶二面体群群代数的Drinfeld double D(Dn)的不可约表示,其中基础域k为特征不整除2n的代数闭域,给出了二面体群群代数上Yetter-Drinfeld单模的结构和同构分类.

Lie Symmetry Reductions and Exact Solutions of a Multidimensional Double Dispersion Equation

In this paper, based on classical Lie group method, we study a multidimensional double dispersion equation, and get its infinitesimal generator, symmetry group and similarity reductions. In particular, similarity solutions and travelling wave solutions of the multidimensional double dispersion equation are derived from the reduction equations.

Development of Strategic Industrial Clusters in Guangdong Higher Vocational Colleges based on the"Double High Plan"

This article analyzed the ten strategic pillar industry clusters and the ten strategic emerging industry clusters which were confirmed and announced by Guangdong Province in May 2020 in addition to the 14 professional groups of schools in Guangdong Province which were shortlisted in the"Double High Plan."With comparison and analysis,the degree of coincidence between the professional groups of higher vocational colleges and strategic industrial clusters in Guangdong Province which covered most of the industrial clusters was relatively high.The higher vocational colleges that were shortlisted in the"Double High Plan"still required dynamic adjustments in the construction of professional groups to achieve an allrounded integration of the supply of talents and industrial demands.

General Cyclic Orthogonal Double Covers of Finite Regular Circulant Graphs

An orthogonal double cover (ODC) of a graph H is a collection of subgraphs (pages) of H, so that they cover every edge of H twice and the intersection of any two of them contains exactly one edge. An ODC G of H is cyclic (CODC) if the cyclic group of order is a subgroup of the automorphism group of G. In this paper, we introduce a general orthogonal labelling for CODC of circulant graphs and construct CODC by certain classes of graphs such as complete bipartite graph, the union of the co-cycles graph with a star, the center vertex of which, belongs to the co-cycles graph and graphs that are connected by a one vertex.

Double Derangement Permutations

Let n be a positive integer. A permutation a of the symmetric group of permutations of is called a derangement if for each . Suppose that x and y are two arbitrary permutations of . We say that a permutation a is a double derangement with respect to x and y if and for each . In this paper, we give an explicit formula for , the number of double derangements with respect to x and y. Let and let and be two subsets of with and . Suppose that denotes the number of derangements x such that . As the main result, we show that if and z is a permutation such that for and for , then where .

International Financial Investments, Double Taxation of Dividends and ＂Effective Taxation＂ in the Portuguese Tax System

The purpose of this paper is to analyze the tax treatment of dividends established in the Portuguese corporate income tax code. The tax code aims at eliminating double taxation, if certain conditions are met. However, if dividends received were not previously subject to effective taxation, the elimination of double taxation no longer applies. The meaning of effective taxation is not defmed nor quantified in the code. But it is of great importance to firms＇ tax planning. In this context, it is a quite important concept, and the paper will discuss it. The methodological approach is based on using a hypothetical situation where a group of finns＇ faces different dividend flows, from diverse origins, and how taxes affect the overall tax burden of the group. The paper highlights the negative implications of a legal void in a very important tax topic regarding dividend policy in holding companies. It shows a tax induced level of uncertainty in designing dividend policy, and how it hinders financial management of groups of firms. The main conclusion is that the lack of a legal or quantitative definition of what constitutes effective taxation is an important factor of tax complexity in planning intercompany dividend policy, and the concept should be revised in legal terms.

“双高计划”背景下高职院校专业群竞争力评价指标体系构建及应用

在“双高计划”高水平专业群面临终期验收和二次遴选的背景下,聚焦专业群建设成效,采用德尔菲专家咨询和AHP层次分析法构建了包括人才培养、师资队伍、教学改革、产教融合和社会服务5个一级指标、11个二级指标、40个三级指标的高职院校专业群竞争力评价指标体系。以广东省14所“双高计划”高职院校为例进行专业群建设实证分析,既验证了该评价指标体系的实际应用价值,又检验了14所“双高计划”学校目前专业群建设水平,从而从创新人才培养、加强师资队伍建设、深化教学改革、推进产教融合、增强社会服务能力等方面提出“双高计划”高职院校专业群建设策略。

服务四川省食品饮料产业的工商专业群人才培养模式探索

依据“双高计划”要求,专业群的人才培养应与产业人才需求精准对接。面向先进制造业、现代农业和现代服务业等重点产业,服务于重点产业转型升级,以体现职业教育为生产劳动服务的功能。工商专业在组群中没有特色,常常被边缘化。因此,要跨专业组群,面向重点产业,兼顾培养懂技术的管理人才,懂管理的技术人才。通过“技术+管理”“工科+商科”,跨专业跨领域交叉融合,服务四川省食品饮料产业。目标是培养“懂管理、善操作、精技术”的复合型技术技能人才和“懂技术、会经营、擅管理”的技术技能型管理人才。

高水平专业群建设产出绩效评价指标体系构建研究

高水平专业群建设绩效评价既是衡量“双高”建设成效的必然要求,也是促进高职院校内涵式发展的迫切需要,还是下一轮双高计划建设单位遴选的重要举措。依据教育部和财政部相关文件,提出了高水平专业群建设绩效评价体系框架。在对产出指标选用原则分析的基础上,选出了9个二级指标下的备选三级指标;运用DEMATEL分析法,对备选三级指标进行优化,确定了产出指标下的评价体系和权重。通过高水平专业群建设绩效评价体系的构建,引导专业群建设方向始终指向“双高计划”总体目标,有效提升专业群的人才培养质量与服务能力。

“双高计划”背景下高职院校专业群建设的政策演进与内涵特质

高水平专业群建设是高职院校治理体系和治理能力现代化的集中体现。纵观我国高职教育发展进程,专业(群)建设作为高职院校发展水平的核心要素和显著标识始终贯穿其中。从政策演进透析专业群建设的历史脉动和演进逻辑,有助于从政策制度层面理解高水平专业群建设在“双高计划”背景下所具有的功能定位和价值旨向,从专业理论层面理解高水平专业群所体现出的“群”“高”“才”诸方面的内涵特质,从而为高水平专业群建设的实现路径和行动方略等提供制度依据和理论支撑。

“双高计划”专业群核心竞争力评估体系研究——以北京财贸职业学院为例

高水平专业群是“双高计划”建设的核心,要保障专业群建设成果,需要积极构建科学有效的评估体系。文章从国家、社会、学校三个层面阐述研究意义,结合“双高计划”专业群九大任务论述了评估体系的六个维度,用文字和图表、定性和定量、多形式评估的形式呈现了具体做法,建立动态调整机制对A、B、C、D档专业实行优胜劣汰,形成一套具有前瞻性的评估体系,助力“双高计划”专业群高质量发展。

茂金属聚乙烯薄膜晶点的组成及形成原因

采用凝胶渗透色谱仪(GPC)、差示扫描量热仪(DSC)、偏光显微镜以及红外光谱等分析手段,从原料的分子链结构分析了茂金属聚乙烯薄膜晶点的组成及其形成原因。结果表明,茂金属聚乙烯薄膜晶点的结晶形态与无晶点的正常薄膜的不同,构成晶点的晶体尺寸均匀性远不如无晶点的正常薄膜,这是因为晶点中含有类似于纤维状的晶体,这种晶体先结晶,导致随后形成的晶体在此处生长不均匀。此外,分子链上的端基双键(RCH CH 2)在吹膜过程中引起的分子间交联和分子链中存在的亚甲基序列较长的规整结构,是形成类纤维状晶体的主要因素,而较长亚甲基序列的规整结构是由于共聚单体分布不均匀引起的。

产业发展视角下高职学校专业群建设的问题表征与发展路向

高职教育的职业属性决定了其专业建设要与区域产业紧密对接,也决定了专业群建设服务产业发展的根本逻辑。高职学校专业群与区域产业协同发展能使其集聚效应得到充分发挥。然而,在高职学校专业群建设中,存在着专业设置与产业发展需求对接不够、培养过程与产业主体缺乏深度融合、建设思路与管理存在路径依赖等现象,这导致组群逻辑定位不准确、专业群整体发展水平不突出、集群效应表现不明显等问题。要促进高职学校的高质量发展,专业群建设需适应区域产业布局,随产业发展灵活调整;整合资源共建共享,培育产教协同育人机制;对接产业“以群建院”,优化内部治理结构。

“双高计划”院校优秀专业群建设特征与可为路径--基于2022年职业教育国家级教学成果奖的分析

专业群建设是“双高计划”(以下简称“双高”)的主要内容和关键环节。通过对2022年职业教育国家级教学成果奖“专业群”主题获奖成果的分析,表明“双高计划”院校在专业群建设中具有紧密对接产业链,跨领域专业集群趋势初显的特征。优秀专业群建设实施了多模式组合,推进产教融合;多方联动,助推专业提升;引培并举,打造师资团队等创新路径。职业院校进一步加强专业群组群逻辑研究,深化产教融合校企合作,完善职业教育专业设置,加强国际交流与合作,有助于全面提升人才培养质量,促进高质量人才就业。

基于大数据应用的高职院校高水平专业群建设管理研究

高水平专业群建设是一项复杂的系统性工程,是专业群内部与外部结构要素的深度融合。涉及专业领域众多、数据和资源繁杂,必须采用数字化管理,运用大数据思维构建专业群建设管理体系,以教师发展、学生成长为目标开展专业群的诊改,动态调整专业群组建和优化专业群资源配置,提升专业群建设管理水平和建设质量。

“双高计划”背景下高职专业群满意度调查研究

以智能控制技术专业群相关专业的在校生、毕业生、教职工、用人单位和家长为调研对象,基于“双高计划”一级指标的九大维度构建社会满意度调查指标框架,采用文献调研、个别访谈与问卷调查相结合的方法,通过SPSS软件进行统计分析,结果显示各服务主体对专业群教学服务的综合满意度评价较高,表明“双高计划”建设各项任务在有效推进。通过创新人才培养模式、推进教学教法改革、优化师资队伍结构、校企共建实践教学基地、打造技术技能平台等手段,进一步提升社会满意度,深化高职院校人才培养供给侧结构性改革,推动高职院校内涵式发展。

“非双高”高职院校教师适应性发展的理念与策略

在分析“非双高”高职院校发展困境基础上,从差异化、特色化发展视角出发,提出了“非双高”高职院校教师适应性发展必须坚守“循规”与“自为”相统一、“针对性”“动态性”与“超前性”相统一的发展理念,以及构建高职教师“三维度”结构能力发展、课程与教学发展策略。